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I thought with the 106 or 108 fuel you've used before, you could get a lot more spark in on Evos and they loved it, but the Cossie would just pop the head gasket? If so, how is it going to be different on the purple?
When I looked in to the race fuel I wanted something that made more power without the need for lots of extra timing, The FTW seems to fit the bill on that side,
We could run Vp import but to make that really work it would be better to run circa 9.5-1 rather than just adding extra timing.
The AG focus runs 50+ psi, I'm sure they don't use that funky fuel either. Why not chat to their engine builder as they have already achieved what you are trying to do?
Why would we do that, Remember we are doing on a pure YB block and head and not the higher flowing Smith and Jones head and taller block for better rod angles,
It is harder to do the 1000hp on a YB for that reason,
Also I hear they are now having to rev it to 9k as it does not have the response lower down,
Rods engine is in his road car and need to still respond like that, We could easily make the power easier with the change on head and block but this will add a circa of 10k on top of what we have already spent.
I thought with the 106 or 108 fuel you've used before, you could get a lot more spark in on Evos and they loved it, but the Cossie would just pop the head gasket? If so, how is it going to be different on the purple?
To add to what Mark has said. We now fit 55% higher shear strength bolts & have done block mods to aid head gasket integrity. However Mark does not want to add extra ignition than we did on the 838 engine that proved safe. The Purple does not need extra ignition just extra fuel to make a 10% increase over 106. The vibration mods will be more critical at this Power level than gasket integrity im sure.
Ah ok that makes sense. Sounds like good progress! Would be really interesting to know the peak cylinder pressure at high compression, high boost and decent fuel!
i think he may be saying Its not road friendly unlike rods engine.
Everything else also struggles, add 1000 rpm at the top end and oil pumps, water pumps, cams etc are all stressed.
Engines that need loads of revs to make the power are hard work. If you drive a 330i or 328 BMW then try an e36 m3 it s amazing how hard you have to work to release the extra power.
Mark - I didn't appreciate the differences. One question, why is revving to 9k + a bad thing?
My last engine revved to 9k but it didn't need to be driven like that. Mark would read the riot act if he read my data log & he saw I was using too many revs Mark don't like rev cuts so it was down to me to be sensible, in mine changing at 8.2k gave best progress but sometimes I used a lot more. Bit shocked to see 193mph (8.8k) in 4th on the Newbury Bypass but its recorded although it wasn't me Mark . Ive a dry sump fitted to this new engine just in case I start using all those revs again . Its not a bad thing but will shorten the life of a road engine.
Well its 2015 & my New Years Resolution is to finish the car this year .
Start next week with a trip to Vibration free to pick up pistons & cams. Will also get the sump sent out for a mod so the dry sump will suit my application. THEN NO MORE EXCUSES FROM MARK OR MYSELF.
Mind blowing stats.
what with the extremes and nessasity for the calculations, would any extra weigh 'hurt' that last few horsepower for top speed?
how much heavier will it be if at all.
cheers
mike
No weight is not really a factor its just bhp v aero brick wall. Gain 100m at the start with less weight & that's only 1 extra second on the throttle at 210mph when you are deffo struggling to acclerate. Stability from the extra weight as speed goes over 190mph more than compensates. These cars were not put in a wind tunnel to see what happens at 190+mph they move about a lot is all I can say. The car will be slightly heavier I suppose but we always run fully loaded so it will make no difference.
This is a long shot.
I need a 80mm 4bar Boost gauge. Only one I can find is a Stack which would be perfect. Problem is they have not been made since 2009 .
Ive asked in the Wanted section as well
Just had a look around and I see what you mean, everything is 3 bar! Do you reckon a company such as Stack would be interested in doing a one off for you?
Can you not just use one of the smaller spa digital ones
I could but my present one is 80mm to match the Rev Counter/Speedo/Odometer.
There are still a few Stack 3 bar ones around despite not being made for 5 years.
My present set-up a 3bar Elliot gauge the Stack 4bar would look so cool I must find one.
Last edited by Rod-Tarry; Jan 8, 2015 at 06:56 PM.
This is a long shot.
I need a 80mm 4bar Boost gauge. Only one I can find is a Stack which would be perfect. Problem is they have not been made since 2009 .
Ive asked in the Wanted section as well
Can a 800bhp be driven on the road without any probs. These 2 vids were made by a Ferrari owning friend. One ive never seen the other maybe at the time. Love his chuckle on the 2nd Vid.
Well before the bridge as you can see. He did it in his Ferrari & saw 92 on the Speedo at the bridge. Mind you its a shite Ferrari .
You know people have been prosecuted on the strength of these types of videos....great to see but do be careful quoting speeds and certainly do not show the speedo.